prettier/tests/flow/async/async2.js

61 lines
1.1 KiB
JavaScript

// @flow
// misc basic
function test1() {
async function foo() {
return 42;
}
async function bar() {
var a = await foo();
var b: number = a; // valid
var c: string = a; // Error: number ~> string
}
}
//
// void returns:
//
// inference should produce return type Promise<void>
// in the absence of an explicit return
//
function test2() {
async function voidoid1() {
console.log("HEY");
}
var voidoid2: () => Promise<void> = voidoid1; // ok
var voidoid3: () => void = voidoid1; // error, void != Promise<void>
}
// annotated return type of Promise<void> should work
//
function test3() {
async function voidoid4(): Promise<void> { // ok
console.log("HEY");
}
}
// other annotated return types should fail
// (note: misannotated return types with explicit
// return statements are covered in async.js)
//
function test4() {
async function voidoid5(): void { // error, void != Promise<void>
console.log("HEY");
}
}
function test5() {
async function voidoid6()
: Promise<number> { // error, number != void
console.log("HEY");
}
}